Trilobite

Trilobites were like ancient sea bugs that lived a super long time ago, even before dinosaurs! They had hard shells, kind of like a knight's armor, to protect them. These amazing creatures swam and crawled on the ocean floor. They came in all sorts of shapes and sizes, from as tiny as your fingernail to as long as a ruler!

Trilobites lived for an incredible 270 million years! That's way, way longer than humans have been around. They were everywhere in the oceans, from shallow waters to the deep sea. But then, one day, they all disappeared. Scientists call this an extinction, and it's a big mystery why they vanished!

Did you know trilobites had amazing eyes? Some had compound eyes, like a fly's, made of lots of tiny lenses, which helped them see in all directions! Others had simple eyes. And guess what? Some trilobites could even roll up into a ball, just like a pill bug, to hide from predators!

We know about trilobites because they left behind fossils. Fossils are like ancient treasures that tell us about life long ago. When a trilobite died, its hard shell would get buried in mud and turn into rock over millions of years. Finding trilobite fossils helps scientists learn about Earth's past oceans!